The amount of a phosphatidylinositol 3,4,5-trisphosphate 3-phosphatase and dual-specificity protein phosphatase PTEN (human) when measured in cerebrospinal fluid. The trait is level of phosphatidylinositol 3,4,5-trisphosphate 3-phosphatase and dual-specificity protein phosphatase PTEN (human) in cerebrospinal fluid (OBA_2058241, an Ontology of Biological Attributes entry). Also known as: cerebrospinal fluid phosphatidylinositol 3,4,5-trisphosphate 3-phosphatase and dual-specificity protein phosphatase PTEN (human) amount.